Greatest Hits: 18 Kids (known as Greatest Hits: 19 Kids on the reissue) is a greatest hits album by Keith Urban, released on 20 November 2007 by Capitol Nashville.[3] It contains 16 of Urban's hits as well as two new songs. Two versions of the album were released: a regular edition and a special edition; the second disc includes 12 music videos. Both versions use the radio edits of Urban's songs, except for "Somebody Like You." Also included is a cover of Steve Forbert's 1980 single "Romeo's Tune" and a re-recording of the non-single "Got It Right This Time", from his 2006 album Love, Pain & the Whole Crazy Thing.

The album debuted at number 11 on the U.S. Billboard 200 chart, selling at least 117,000 copies in its first week.[5] It received a Gold certification from both the RIAA and CRIA. It has sold 1,208,700 copies in the U.S. as of April 2017.